code: def show_help():
      str = "serving <option>\n"
      str += "\tManage PaddleHub Serving.\n"
      str += "sub command:\n"
      str += "1. start\n"
      str += "\tStart PaddleHub Serving.\n"
      str += "2. stop\n"
      str += "\tStop PaddleHub Serving.\n"
      str += "3. start bert_service\n"
      str += "\tStart Bert Service.\n"
      str += "\n"
      str += "[start] option:\n"
      str += "--modules/-m [module1==version, module2==version...]\n"
      str += "\tPre-install modules via the parameter list.\n"
      str += "--port/-p XXXX\n"
      str += "\tUse port XXXX for serving.\n"
      str += "--use_multiprocess\n"
      str += "\tChoose multoprocess mode, cannot be use on Windows.\n"
      str += "--modules_info\n"
      str += "\tSet module config in PaddleHub Serving."
      str += "--config/-c file_path\n"
      str += "\tUse configs in file to start PaddleHub Serving. "
      str += "Other parameters will be ignored if you specify the parameter.\n"
      str += "\n"
      str += "[stop] option:\n"
      str += "--port/-p XXXX\n"
      str += "\tStop PaddleHub Serving on port XXXX safely.\n"
      str += "\n"
      str += "[start bert_service] option:\n"
      str += "--modules/-m\n"
      str += "\tPre-install modules via the parameter.\n"
      str += "--port/-p XXXX\n"
      str += "\tUse port XXXX for serving.\n"
      str += "--use_gpu\n"
      str += "\tUse gpu for predicting if specifies the parameter.\n"
      str += "--gpu\n"
      str += "\tSpecify the GPU devices to use.\n"
      print(str)
  
imports: import argparse
  import os
  import platform
  import json
  import multiprocessing
  import time
  import signal
  import paddlehub
  from paddlehub.commands import register
  from paddlehub.serving import app_compat
  from paddlehub.env import CONF_HOME
  from paddlehub.serving.http_server import run_all, StandaloneApplication
  from paddlehub.utils import log
  from paddlehub.utils.utils import is_port_occupied
  from paddlehub.server.server import CacheUpdater
label_desc: Use image node_id 10 for calling the ServingCommand obj's underlying member method code with example usage: obj.show_help() without return types